Real time syncing

Question

I want to develop application same as UBER in which I need to show available taxis in the selected region and update as the taxis are hired, available, unavailable. Kind of auto refresh. Calling the web service in the background after regular time interval is not a good option. Can any one suggest me better and fast way to achieve this.

Thanks

Answer 1

Push

• Use sockets when the app is running. This will give you immediate updates.
• Use Push notifications when the app is not running (use notifications for critical changes), and ignore these notifications when the app is already running, in favor of sockets.

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Pull

• Use NSURLSession to refresh your local DB with some regularity. This is very resilient to network failure.

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Use a combination of approaches, since speed and robustness are mutually exclusive. Ultimately, your objective is to keep your local DB in sync with your server's DB, and fire internal messages as data changes. No small task, hence the Firebase answer.